Fix sanitization
Fix sanitization

- Temporarily copy from
  whitequark/ppx_deriving@e2079fa8f3460055bf990461f295c6c4b391fafc

- Apply consistently

alainfrisch/js_of_ocaml,alainfrisch/js_of_ocaml,alainfrisch/js_of_ocaml,alainfrisch/js_of_ocaml,alainfrisch/js_of_ocaml